Won't cold start
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Senior User
Joined: Oct 2006
Posts: 199
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From: Blue Springs, MO
Won't cold start
I have a 1999 E-350 7.3 diesel. When the temp is over 20 degrees or when I use the oil heater it starts well but when the temp drops below 20 and I don’t use the oil heater I can’t get the truck to start with out a jump. I’m assuming that this is not normal where should I look for the problem?
Elder User
Joined: Feb 2005
Posts: 896
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From: Chattahoochee Hills, Ga.
Heck, it's so cold here in Georgia I can't believe it ! I don't know how our Brothers and Sisters up North stand it. I've let my 7.3 sit the past few days and have been driving my Jeep. If I have to pull something or go further than 10 miles to town I'll fire up the beast.
Tuned
Joined: Mar 2003
Posts: 394
Likes: 10
From: austin
Have you checked voltages yet? All of the below applies to an 03 F250, hopefully it's accurate for a 99 E350 as well.
Sounds like the batteries are taking a beating from your cold weather (32* weather in TX stranded me on Christmas Eve with weak batteries).
The PCM won't turn the injectors on if the engine RPM is not fast enough - does it seem like it's turning over slowly or at normal speed?
Also, the glow plug relay should be checked - you should have the same voltage as the batteries on both of the large studs when it's cold and the key is on. This is a large draw on your batteries when it's working.
-Chris
Sounds like the batteries are taking a beating from your cold weather (32* weather in TX stranded me on Christmas Eve with weak batteries).
The PCM won't turn the injectors on if the engine RPM is not fast enough - does it seem like it's turning over slowly or at normal speed?
Also, the glow plug relay should be checked - you should have the same voltage as the batteries on both of the large studs when it's cold and the key is on. This is a large draw on your batteries when it's working.
-Chris
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